Valve for making connection between underground main piping and underground branch piping



June 7,1927. 1,631,564

D L H. VAN RAALTE VALVE FOR MAKING CONNEbTfON BETWEEN UNDERGROUND MAIN PIPING AND UNDERGROUND BRANCH PI PING Filed July 1926 x 1.. 'e I I I Patented June 7, 1e27.

UNITED STATES PATENT 'opm DIEDEBIK LODIEWIJK HENDRIX VAN BAAL'I'E, OF VLISSINGEN, NETHERLANDS.

VALVE FOR MAKING CONNECTION BETWEEN UNDERGROUND MAIN PIPING AND.

UNDERGROUND BRANCH rrrme.

Application filed July 16, 1926, Serial No. 122,838!;, and in Germany July 14, 1925. v

' This invention relates to improvements in valves of that type which are used for making connection with underground mains while the latter are carrying fluid at worka ing pressure. In tapping mains while they are .under working pressure it'is customary to use a special drilling and threading device into which a plug constituting a part of the valve structure is inserted, the drilling and threading operation and the insertion of the plug being mechanically accomplished without the loss offluid or pressure from the main. It is, of course, essential that the plug be temporarily closed at the time of its insertion into the threaded hole of the main and that the stopper which forms the closure be afterward withdrawn in such a manner as to ermit communication between the bore 0 the plug and the branch conduit to which the valve-is con- 'nected.

A well-known form of valve used in making such connections with a main under pressure is known as the Morris valve. The present invention is an improvement on the Morris valve and successfully overcomes certain disadvantages and faults inherent in the construction and design of the Morris valve. In order clearly to distinguish the new from, the old, Fig. 1 of the drawings illustrates an axial section through an ordinary Morris valve while Fig. 2 is a similar view of a valve embracing the principles of the present invention, Fig. 3 being in part a 5 section taken along the line 3-3 of Fig. 2,

a and in part aplan view of said Fig. 2.

'Before adverting to the structure of the fiesent invention it will be noted that the orris valve illustrated in Fig. 1 consists D essentially of a valve casing made in three parts, part 1', this being the plug which is inserted in the drilling machine and temporarily closed by the stopper 2'; 'part 17' which is screwed upon part 1 after the re- 5 moval of the drilling machineand which is formed with a branch nipple 6; and part 8', a cap which screws upon the part 1'? and is provided within its flanged end with a packin element 12'. A packing 11' is J interpose between the parts 1' and 17'.

It -will be noted that a threaded bore is provided within the plug 1' and part 17' for the traverse of the stopper 2' and that access is had to said stopper 2' through a hole 13' 5 in the top of the cap. By the insertion of valve casing pro ucing a lea at the packthe valve casing.

an appropriate tool in the hole 13' and in olygonal recess within the stopper 2', the atter may be rotated by manipulation of the tool so as to be advanced from the 1pgisition shown in Fig. 1 upwardly wit the threaded bore until it abuts against the packing 12' with which it is supposed to make a fluid tight joint.

Now, in practice, two untoward circumstances are likely to happen unless the thread-3 in the plug 1' and the thread 4: within the part 17 are in exactly the proper .relative phase. When the stop er 2' is 12'. urning now to the present invention, 1

designates the screw plug, 2 the stopper,

while the valve casing is designated by the numeral 3. It will be observed that the valve casing 3 is formed with an integral cap and that the plug 1 is formed with an extension 8 reachin almost to the top of aid extension is threaded both externally and internally, the internal thread which is designated as 4 being adapted for the traverse'of the stopper 2. The valve casing is screwed upon the external' thread substantially throughout the length thereof giving a long joint to resist leakage with the exception of an intermediate part where an annular channel 15 is formed communicating with ports 10in the extension 8 and with the lateral branch nipple 6. A packing 12 lies within the top of W the valve casing 3 and another packing 11 is interposed between the valve casing and the plug 1.

It is obvious that the thread which must be traversed b the stopper 2in traveling from the seated position in which it is shown to a seating position against the packing 12, is continuous so that there is no jamming nor is there any tendency to loosen the valve casing withrespect to the plug 316 the seated position within the shown to its normal position in fluid tight as is the case in the old form of valve; Furthermore, since the cap is integral Wlth the valve casing there is no ten ency, for

the cap to rotate under the friction of the stopper 2, loosening it with respect to the valve casing. The 12 is solely for the purpose ofv ma with the sto per 2 and preferably plays no part in sea, ng the jointibeiiween the extension and the valve casing, this joint being efl'ectively sealed by the long leakage 82th provided by the threaded connection tween the valve casing and BXFGTISiOD and by the packin 11.-

After inst ation of the valve the stopper 2, is advanced along the extension 8 in the same manner as in the Morris valve by inserting an appro riate tool through the hole 18 in the top 0 the valve casing andinto a polygonal recess 14 in the stopper, ,The extension 8 is made of suflio'ient' all that when the stopper is transferred from ug as contact with the packing 12 ,itwill be entire- 1y above the ports 10 permitting unrestricted flow of fluid through said ports,

1. A valve including a screw plug having an external. shoulderafiording a seat for a pa mg serewingvuupon-salid 'screwflug liavin'g.

the lower endrther'eof adapte to form a fluid tight joint w1th thep'acking, on said external shoulder, said-{casing being formedwith a' perforated cap, apacking within ng a fluid tight seat gtliso 'externa ckmg and being provided interiorly witha bore, and a largen c'ounterbore, the wall said cap, said casinghaving a lateral passage communicatin stopper threaded within said counter-bore having-valve seats-at-itso posite ends en.

gageable alternativ'el wit said internal.

shoulder and the 'pac ing within said cap, said casing being'of such depth as to maintain a space between thepacking in the cap and the end of the screw plug when the lower end of saidcasing is in' fluid tight relation with the external shoulder.

2. A valve including a screw plug having '55 an external shoulder afiordingja seat for a packing "and being provided interiorly with a bore and a largencounter-bore, the wall of the ,la'tterfbe'ing threaded, the junction of said bore and counter-bore forming a shoulder, said screw plug being formed with lateral length 9 said counter-bore, a one piece casrts in a zone'intermediate' the mg screwing upon said screw plug having -thelower end thereof adapted to form a fluid, tight joint with the packing on said shoulder, said casing being formed with a perforated cap, a packing within said cap, said casing aving a lateral passage communicating with sald ports, a stopper threaded within saidcounter-bore havmg valve seats at its opposite ends en'- gageable alternatively wlth said internal shoulder .and the packing within said cap, said casing being of such depth as to maintain a space between the pac ing in the cap and the end of the screw plug when the lower end of said casing is in fluid tight relation with the external shoulder, said stogeper being of such length as to be entirely low the zone of said ports when seated upon said internal shoulder.

In testimony signature.

' DIEDERIK LODEWUK HENDRIX VAN RAALTE.

whereof I have aflixed my,

with said ports, a 

